WASHINGTON - Republican presidential candidate Donald Trump lashed out Tuesday at his critics within the party, saying they have made a mess of the country, even as another survey showed the advantage growing for his opponent, Democrat Hillary Clinton.
Trump's attack came as Republican Senator of Maine, of the country's Environmental Protection Agency, and national security and foreign policy officials who served under previous Republican administrations said they cannot support Trump.
"I am running against the Washington insiders, just like I did in the Republican primaries," Trump said on his Twitter account. "These are the people that have made U.S. a mess!"
I am running against the Washington insiders, just like I did in the Republican Primaries. These are the people that have made U.S. a mess!
He told one television interviewer, “I think that my temperament has gotten me here. I’ve always had a good temperament and it’s gotten me here. We beat a lot of people in the primaries and now we have one person left, and we’re actually doing pretty well there, but we’ll see how it all comes out.”
Numerous U.S. political surveys show Clinton, a former secretary of state, pulling further ahead of Trump, a real estate mogul seeking his first elected office.
The weekly NBC News/Survey Monkey poll released Tuesday showed Clinton with a 51 to 41 percent edge over Trump, up from an 8-point gap a week ago and the biggest spread between the two candidates since the television network started polling on the matchup in early May.
Quinnipiac University said its polling in three election battleground states showed Clinton with the slimmest of leads over Trump, 46-45, in the southeastern state of Florida, with a 49-45 edge in the Midwestern state of Ohio, and with a substantial advantage in the eastern state of Pennsylvania, 52-42.
Quinnipiac pollster Peter Brown noted that large numbers of voters in the three states said their decision hinged more on their rejection of the other candidate rather than support for the candidate they would vote for.
Collins, in an in , said Trump does not represent Republican values or the "inclusive approach to governing" the country needs.
Collins, who was elected to the Senate in 1996, said Trump, once the host of a television reality show, "lacks the temperament, self-discipline and judgment required to be president."
She said that in part she views Trump as unfit for the presidency based on his disregard for the principle of treating other people with respect.
"Instead, he opts to mock the vulnerable and inflame prejudices by attacking ethnic and religious minorities," Collins said.
She also expressed the worry that if elected, Trump's "lack of self-restraint and his barrage of ill-informed comments" would make the world more dangerous.
Meanwhile, two former U.S. environmental protection chiefs, William Ruckelshaus and William Reilly, said that while Republicans have broadly supported environmental protection, Trump "." They attacked his rejection of climate change.
"That Trump would call climate change a hoax -- the singular health and environmental threat to the world today -- flies in the face of overwhelming international science," the former environmental officials said.
The group of former Republican national security and foreign policy officials opposing Trump includes one-time Homeland Security chiefs Michael Chertoff and Tom Ridge, former CIA chief Michael Hayden, and former Director of National Intelligence and Deputy Secretary of State John Negroponte.
The officials said they know what it takes to be president and that Trump lacks the character and experience for the job.
"Mr. Trump has demonstrated repeatedly that he has little understanding of America's vital national interests, its complex diplomatic challenges, its indispensable alliances, and the democratic values on which U.S. foreign policy must be based," the officials' letter said. "At the same time, he persistently compliments our adversaries and threatens our allies and friends."
The former officials wrote that Trump shows "an alarming ignorance of basic facts" about today's international politics and no desire to educate himself.
Trump's campaign said those who signed the letter deserve "the blame for making the world such a dangerous place."
"They are nothing more than the failed Washington elite looking to hold onto their power, and it's time they are held accountable for their actions," the campaign said. It attributed the decision to invade Iraq in 2003 and the rise of Islamic State to the group, as well as to Clinton.